#include <iostream>
#include <string>

using namespace std;

class OAUser {
private:
  string _username;
  string _password;
  string _department;

public:
  OAUser();
  OAUser(string username, string password, string department);

  friend class OADataCebter;
  static OAUser ERROR_USER;

  string username();
  string department();

  bool reserveMeetingRoom(int mid);
  bool cancelReserveMeetingRoom(int mid);
  void printMeetingRoomByUser();

};